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5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch
38697- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
2334How to calculate cable sizes in sq.mm. with using motor KW? Any formula there?
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18 307547I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.
2083what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...
4 32890is there any difference between protection C.T and measuring C.T?if yes then what is the difference?
4 12811Post New Electrical Engineering Questions
What do you mean by the zone of protection?
We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables) please provided formula for calculate the cable with example.
what is deffrence between squirral cage and wound rotor in IM?
Why field rheostat is kept in minimum position while armature rheostat at maximum position?
Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?
HOW TO CALCULATE AMPs OF CURRENT TRANSFORMER IN HT Panel
Witch do depand of Power factor and theory of power factor?
What are the different circuits in thermal power plant?
what is difference between 5A and 100A CT constructional wise and operation?
WHAT IS START TO INDUCTION MOTER IN STAR TO DELTA OF >5HP ?
If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?
The sodium vapor lamp is not glows when it is connected a distance of 5 meters above from gearbox, why ?
How to assume answer to electrical questions
Why the standard of ambient teperature mentioned as 40 degree celcius in machines.
what will happen if frequency is below 50 hz?
